Added missing unlock_kernel() to NFS lookup patch.

Signed-off-by: Steve Dickson <steved@redhat.com>
-----------------------------------------------
--- linux-2.6.12.3/fs/nfs/dir.c.orig	2005-07-15 17:18:57.000000000 -0400
+++ linux-2.6.12.3/fs/nfs/dir.c	2005-08-01 13:46:19.000000000 -0400
@@ -835,6 +835,7 @@ static struct dentry *nfs_atomic_lookup(
 	error = nfs_revalidate_inode(NFS_SERVER(dir), dir);
 	if (error < 0) {
 		res = ERR_PTR(error);
+		unlock_kernel();
 		goto out;
 	}